package com.sky.service.impl;

import ch.qos.logback.core.joran.util.beans.BeanUtil;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品
     * @param dishDTO
     */
    @Transactional
    @Override
    public void addDish(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        // 获取菜品主键值id
        Long dishId = dish.getId();

        // 批量插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        // 为口味数据设置菜品id
        flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
        dishFlavorMapper.insertBatch(flavors);
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());

        Page<DishVO> p = dishMapper.pageQuery(dishPageQueryDTO);

        return new PageResult(p.getTotal(),p.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */

    @Transactional(rollbackFor = Exception.class)
    @Override
    public void deleteById(List<Long> ids) {
        if (ids==null || ids.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.NO_ID_ON_SALE);
        }
        //起售中的菜品不能删除
        for (Long id :ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus().equals(StatusConstant.ENABLE)){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //被套餐关联的菜品不能删除
        List<Long> setmealDishIds = setmealDishMapper.getByDishId(ids);
        if (setmealDishIds!=null && !setmealDishIds.isEmpty()){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //根据id批量删除菜品数据
        //        for (Long id : ids){
        //            dishMapper.deleteById(id);
        //            //删除菜品关联的口味数据
        //            dishFlavorMapper.deleteByDishId(id);
        //        }

        //根据id批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //删除菜品关联的口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Transactional
    @Override
    public DishVO getByIdWithFlavor(Long id) {

        DishVO dishVO = new DishVO();

        // 根据菜品id查询菜品数据
        Dish dish = dishMapper.getById(id);
        BeanUtils.copyProperties(dish,dishVO);

        // 根据菜品id查询口味数据
        List<DishFlavor> dishFlavor = dishFlavorMapper.getByDishId(id);
        if (dishFlavor!=null){
            dishVO.setFlavors(dishFlavor);
        }

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     * @return
     */
    @Transactional
    @Override
    public void update(DishDTO dishDTO) {
        //将dishDTO中的数据拷贝到dish中
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);


        Long dishId = dishDTO.getId();
        dishFlavorMapper.deleteByDishId(dishId);

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors!=null && flavors.size()>0){
            flavors.forEach(dishFlavor -> dishFlavor.setDishId(dishId));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 启用禁用菜品
     * @param status
     * @param id
     * @return
     */
    @Override
    public void setStatus(String status, Long id) {
        Dish dish = Dish.builder()
                .status(Integer.valueOf(status))
                .id(id)
                .build();
        dishMapper.update(dish);
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> selectByCategoryId(Long categoryId) {

        return dishMapper.selectByCategoryId(categoryId);

    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    @Override
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
